Avionics Magazine presents the third edition of our comprehensive Aerospace Acronym Guide. Since we started compiling the list in 2002, the number of acronyms and abbreviations has grown by 660 entries, from 2,306 to 2,966.
Though it is not an exhaustive list, we trust it will serve you well.
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O&M operations and maintenance
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O&S operating and support
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OAC oceanic area control center
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OAS oceanic automation system
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OASIS operational area satellite information system
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OASIS operational and supportability implementation system
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OASIS organic airborne and surface influence sweep
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OASYS obstacle avoidance system
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OAT operational acceptance test
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OAT outside air temperature
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OATS orbit and attitude tracking system
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OBP operational build plan
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OBS omnibearing selector
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OBS optical bypass switch
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OCA oceanic control area
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OCC occasionally connected computing
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OCC operations control center
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OCD oceanic clearance delivery
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OCIG Oceanic Communications Improvement Group
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OCP oceanic clearance processor
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OCTAS obstacle cable and terrain avoidance system
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ODA open document architecture
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ODAPS oceanic display and planning system
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ODIAC operational requirements for ATM air/ground data communications (Eurocontrol)
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ODID operational display and input development
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ODL optical data link
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ODL oceanic data link
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OEM original equipment manufacturer
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OEP operational evolution plan
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OES Office of Emergency Services
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OEU overhead electronics unit
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OFDM orthogonal frequency division multiplexing
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OFDPS oceanic flight data processing system
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OFP operational flight program
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OGE operational ground equipment
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OHA operational hazard assessment
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OHU overhead unit (HUD)
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OID object identifier
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OIG Office of Inspector General
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OIT onboard information terminal
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OJT on-the-job training
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OLAN onboard local area network
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OLDI on-line data interchange
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OM outer marker
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OMB Office of Management and Budget
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OMS onboard maintenance system
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OMTs onboard maintenance terminals
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OMT object modeling technique
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ONR Office of Naval Research (U.S.)
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OOA object-oriented analysis
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OOD object-oriented design
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OODA observe, orient, decide and act
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OOOI out/off/on/in
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OPA operational performance assessment
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OPAS overhead panel ARINC 629 system
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OPBC overhead panel bus controller
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OPS operations
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OPS OPS per second
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OPSPECS OPS specifications
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OPU overspeed protection unit
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O-QAR optical quick access recorder
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OR operational requirements
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ORB object request broker
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ORD operations readiness demonstration
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ORD operational requirements document
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OS operating system
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OS open service
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OSA operational safety assessment
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OSCAR Orbiting Satellite Carrying Amateur Radio
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OSDS oceanic systems development support
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OSE open systems environment
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OSED operational service and environment definition
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OSEIC operational service and environment information capture
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OSI open systems interface/ interconnection
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OSIE OSI environment
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OSI-RM OSI reference model
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OSJTF open systems joint task force
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OSPF open shortest path first
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OSR order status report
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OTA Office of Technology Assessment (U.S.)
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OT&E operational test and evaluation
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OTFP operational traffic flow planning
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OTH over the horizon
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OTP Office of Telecommunications Policy (U.S.)
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OTS off the shelf
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OVHT Overheat
